Push-button switch.



HEINRICH \3ISt.2HEl'.`l.l'SEE` AND ,ALEXNIDEB HEPKE, UF BERLIN, GERMANY.

PUSH-:EUTTGN SWITCH.

To all whom t may concerny Be it known that we, Hamelen lVIsoii- HUSENand ALEXANDER Harlin, citizens of the Empire of Germany, and residing atBerlin, Germany, have invented certain new and useful Improvements inPush-Button- Switches, of which the following is a specification. y

Our invention relates to press-buttoi switches and a primary object isto provit e a simple switch of this type.

1n press-button switches known heretofore comprising rotatingcontact-pieces two meinbers have been provided for returning thepress-button into its initial position and for giving the rotatoi'ymovement to the movable contact-pieces. According to our invention weemploy for these two purposes only one single spiral spring which issubjected both to compressive and to torsional strain.

One illustrative embodiment of our invention is represented by Way ofexample in vertical section in the accompanying draw` liteferring to thedrawing, the central hole in the cover e of insulating material is rovided with a spiral groove d in whicli is guided the upper,1 radiallybent end b of the spiral spring a. The lower radially bent end c of thespiral spring,r a bears against one of the ratchet teeth on the crownwheel i fast on the switch-drum i. This drum is fast on the axle aand'carries the electrically conducting contact-ai'msm and n which inthe on position connect to ether the two connectiomcontacts o and p orthe wires q and r, and thus close the circuit. The axle c is journaledin a recess inthe base f and is guided at its upper end in a bore in theress-buttonl g, which is able to move up and own in the central hole inthe cover. The upward motion of the press-button g is lim ited by f.stov not shown in the drawing.

Any suite le known device may be used for arresting the `drain i in the'on" and voti positions. In the illustrative embodiment a square block cis fast on the lower end of the axle, and is located between the two Hetsprings l. When the axle e carrying the drurn 1s rotated the squareblock k' is driven forward by the action of the springs Z as soon as ithas moved more than 45", and after rotating 90 from its normal positionis arrested between the springs Z.

Now when the prese-button g' is depressed,

Specification o! Letters Patent.

Application flied March 25, 1812. Serial No. 666,199.

Patented May 13, MM 3.

the pressure is transmitted to the spiral spring a which is compressedin the axial di reetion. When thisvspring is depressed its upperradially lient end b which is guided in the n'roove d is simultaneouslydriven cir cum erontially, the result boing that the spring is subjectedto torsional strain. The )torsion is increased by the continueddownwai-d iiiotion of the pressbutton (l, until the spying at lastovercomes ooth the friction at the contact-pieccs m, n and the tensionof the springs Z, and the drum z' flies over into the next stoppingposition. The torsion of the spring a is hereby partly relieved. Theremaining torsion apart from the initial tor sion which is alwayspresent, is used for placing the lower end c of the spring behind thenext ratchet tooth to the rear on the crown wheel, rlfhe press-button gis simultaneously forced back by the axial pressure of the spiral springd. W'e claimrd 1. In a push button switch the combination of a baseplate, -a covei provided with an inner spiral groove, an axle journaledin said base plate, a drum secured to said aide, a push button movabledown and up along said axle, a spiral spring arranged about the axle andhavinnr one end adapted to rotate said drum anc the other guided in saidspiral groove when said spring' ispoinpressed by the push button.

Q. In a press-button switch, the combination of a base-plate, a coverhaving a central hole mounted thereon, said hole having a spiral groove,an axle 'ournaled in the base and extending into said hole, a drum faston the axle under the cover, a pressdiutton n1ovable down and up in saidhole, a spiral spring arranged about the axle in said holo and havingone end adapted to rotate said drum, the other erid of said spring beingguided in said groove.

3. In a pi'ess-biiti.on switch, the combination of a base-plate, a coverhaving a central hole mounted thereon, said hole havinga spiralgroove,an axle ournaled in't'ne base and extending into sait hole, adrum fast on #the axle under thc cover, a crown wheel rig- Ll. in apress-button switch, thocombina l I I A. 1,061,575

tion of a buse-plate, a cover `having a central hole mounted thereon,said hole having a spiral groove, an axle journaled in the base andextending into said holeI a drum fast on the axle under-the cover, atra-own Wheel having four ratchet teeth rgidl connected with the drum,a; press-button mfable clown and up in said hole7 a spiral springarranged about the axle in said hole and having one enrl normallyresting behind one tooth of the crown Wheel`- the other end of saidspring bengguided in said groove,'a square block fast on the axle, andtWoleaf springs normally bearing against opposite faces of the block. 15

ln testimony whereof, we ax our signatures in the presence of twowitnesses.

4HEINRICH WS'SCHHUSEN.

ALEXANDER HEPKE.

Witnesses: e

HENRY HASPER, VVOLDEMAR HAUPT.

